Simultaneous Determination of Heavy Metals in Waste and Biogas Slurry of Scale Farm by Microwave Digestion/Inductively Coupled Plasma-Mass Spectrometry
HE Qiang1, MHAMADI Anthony Thomas1, JI Fang-ying1, YU Dan-ni1, ZHOU Guang-ming2, LI Si1
1. Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China 2. School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
Abstract：A new microwave digestion/inductively coupled plasma mass spectrometry (ICP-MS) for simultaneous determination of 8 heavy metals including Zn, Cu, As, Pb，Cd, Cr, Hg and Ni in wastes of scale hoggery from livestock parks in Chongqing and its biogas slurry after anaerobic digestion, with which an all round, fast analysis of multiple heavy metals in biogas slurry was realized. From the experiment, Zn, Cu, As, Pb，Cd, Cr, Hg, and Ni were the dominating heavy metals in biogas slurry. The linear correlation coefficients for the heavy metals were between 0.999 89 and 0.999 98, indicating a good linear correlation. The determination limits were between 0.79 and 25.0 ng·L-1, recovery adding standard between 96.5% and 107.6%, RSD between 1.06% and 4.35%. These parameters revealed that the method has good precision and accuracy, which could be applied to the heavy metals detection in biogas slurry, and provide reference for its post-use.
Key words：Farm waste;Biogas slurry;Microwave digestion;ICP-MS;Heavy metal
何 强1，MHAMADI Anthony Thomas1，吉芳英1，虞丹尼1，周光明2，黎 司1 . 应用ICP-MS同时分析养殖场污物及其沼液中的重金属元素 [J]. 光谱学与光谱分析, 2012, 32(12): 3399-3401.
HE Qiang1, MHAMADI Anthony Thomas1, JI Fang-ying1, YU Dan-ni1, ZHOU Guang-ming2, LI Si1 . Simultaneous Determination of Heavy Metals in Waste and Biogas Slurry of Scale Farm by Microwave Digestion/Inductively Coupled Plasma-Mass Spectrometry. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(12): 3399-3401.
